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-- Turtle digger program
-- version 1.1
-- author mac

len = arg[1]
DIG_TIMEOUT = 0.15
TRASH = {
  "minecraft:gravel",
  "minecraft:cobblestone",
  "minecraft:granite",
  "minecraft:diorite",
  "minecraft:andesite",
  "minecraft:dirt"
}
fuelLevel = turtle.getFuelLevel()
doDropTrash = 0

if arg[2] == "1" then
doDropTrash = 1
end

if len == nil then
  print("Must define len by using param")
  return
end


if fuelLevel < 1*len then
  print("Not enough fel for that length you need a ", 5*len, "current",fuelLevel)
  return
end

function dropTrash()
  for i = 1,16 do
    a,b = turtle.getItemDetail(i)
    if a ~= nil then
      for block = 1,6 do
        if a.name == TRASH[block] then
         turtle.select(i)
         turtle.dropDown()
        end
      end
    end
  end
  turtle.select(1)
end

function checkInventory()
  while turtle.getItemCount(16) > 0 do
    print("Full inventory, please clear")
    sleep(10)
  end
end

function sdig()
checkInventory()
while turtle.detect() do
    sleep(DIG_TIMEOUT)
    turtle.dig()
  end
end

function sdigUp()
  checkInventory()
  while turtle.detectUp() do
    sleep(DIG_TIMEOUT)
    turtle.digUp()
  end
end

function digUpAndDown()
  checkInventory()
  sdigUp()
  turtle.digDown()
end



for i = 0,len do
  print("progress ",i ," of ", len)
  sdig()
  turtle.forward()
  digUpAndDown()

  if i % 5 == 0 and doDropTrash == 1 then
    dropTrash()
  end
end